According to GasBuddy price reports, the cheapest station in Arizona is priced at $2.37/g today while the most expensive is $4.09/g, a difference of $1.72/g. The lowest price in the state today is $2.37/g while the highest is $4.09/g, a difference of $1.72/g. The cheapest price in the entire country today stands at $1.84/g while the most expensive is $5.09/g, a difference of $3.25/g.

The national average price of gasoline has fallen 1 cent per gallon in the last week, averaging $2.55/g today. The national average is down 9.9 cents per gallon from a month ago, yet stands 28.7 cents per gallon lower than a year ago.

Neighboring areas and their current gas prices:Las Vegas- $3.05/g, unchanged from last week's $3.05/g.Phoenix- $2.90/g, up 0.5 cents per gallon from last week's $2.89/g.Tucson- $2.53/g, down 1.1 cents per gallon from last week's $2.54/g.

"For its eighth straight week, the national average has declined even as oil prices have bucked the trend in the last week, moving higher on optimism over upcoming trade talks between China and the United States," said Patrick DeHaan, head of petroleum analysis for GasBuddy. "While most of the country saw gas prices continuing to drop, it certainly was not all. The West Coast has gas prices rise gently in recent weeks, but those increases likely won't last. Moving forward, I believe the market will closely watch the October trade talks and any comments made between the countries until then, and gas prices will track with optimism- should there be a positive conciliatory tone between the two, we may see a more organized, but temporary, upward move. If trade talks fall apart, then expect more price declines that will accelerate in the weeks ahead. Markets have been reliably unreliable in recent weeks and it seems that will likely continue as the talks hold significant meaning for oil and gasoline demand."

GasBuddy is the authoritative voice for gas prices and the only source for station-level data spanning nearly two decades. Unlike AAA's once daily survey covering credit card transactions at 100,000 stations and the Lundberg Survey, updated once every two weeks based on 7,000 gas stations, GasBuddy's survey updates 288 times every day from the most diverse list of sources covering nearly 150,000 stations nationwide, the most comprehensive and up-to-date in the country. GasBuddy data is accessible at http://FuelInsights.GasBuddy.com.